Combination-rule.



H. H. LAMBERT.

COMBINATION RULE.,

APPLICATION FILED SERT. 5. 19|?.

H. H. LAMBERT.

COMBINA'TlON RULE.

APPLICATION man SEPT. 5, 19u-1.

Patented Apr. 30,1918.

2 SHEETS-*SHEET 2.

Arrow/175V HOMER H. LAMBERT, F PORTLAND, OREGON.

. COMBINATION-RULE.

incassi.

Specification of Letters Patent.

pplication led September 5, 191'?.v Serial No. 189,728.

To all whom t may concern.'

Be it known that I, HOMER H. LAMBERT,

a citizen of theUnited States, residing at vice to be folded.

Thel invention has for its object to provide a rule of thetype stated, having novel and improved means whereby it may be used as a bevel square, yas well as a protractor for ineasuring'and laying 0E angles.

The object stated is attained by means of a combination and arrangement of parts to 'be hereinafter described and claimed, and in order that the invention may be better Yunderstood, reference is had to the accompanying drawings forming a part of'this specification.

In the drawings-- v Figure 1 is a plan'viewof the rule folded;

Figs. 2 and 3 areV plan views illustrating the manner in which the rule is used for measuring and laying off angles;

Fig. 1 is an inverted plan view ofthe rule positioned as shown in Fig. 2;

Fig. 5 is a plan view of the rule completely unfolded;

Figs. 6 and 7 are sections on'the'line 6-6 and 7-7, respectively, of Fig. et, f

Fig. 8 is a section on the line 8-8 Fig. 5;

Fig. 9 is a section on the line 9--9 of Fig. 2, and Fig. 10 is a section on the line 10-10 of Fig. 1.

Referring specifically to the drawing, 5 and 6 denote the two blades of a rule, the same being pivotally connected as shown at 7 in the vordinary manner so that they may be folded together. The blades are graduated as usual. Y Y

With the blade 5 is associated a degree scale 8 which is inscribed on a base plate 9 on which said blade is mounted in fixed position; or the blade and the plate maybe formed integral. The plate 9 is somewhat wider than the blade 5 so ras to leave a suiicient width of its surface exposed on one sideto display the scale 8. This exposed surface corresponds to thewidth of the blade 6, so that when said blade is folded along-- side the blade 5, it seats on said surface and covers the same. The back of the plate9 is graduated, said graduations being continuations'of the blade 6.

Patented Apr; 30,1918. i

co` graduations on the back of the The blade 6 carries anindicator or pointer 10 for the scale 8. This pointer is at the p outer end of an arin 11 having its inner end` pivotally connected, as shown at 12, to one end of an arm 13, which latter is pivoted .at its other end, as shown at 14,'to the bladev adjacent to the pivot or hinge joint 7,`the

' connection being lnade at the back yof the blade.

The end of the arm 13 which is hinged to the arm 11 has a laterally extending latch hook 15 adapted to engage a keeperV on the back of the blade 6. This keeper is a spring strip 16 seating in a recess in the blade 6 and having a lug 17 to snap over the hook 15. When the latch hook is engaged with e its keeper, the arm 11 is locked tothefblade 6, upon disengaging the latch hook, the arm l1 may be swung over on the plate 9. V[The purpose of this will be presently made clear.

` The arm 13 also has a retaining hook 18 extending'from one of Vits edges and adapted to be slipped over the inner edge of the blade 6 when the latch hook is engaged with its keeper. The inner edge of the blade 5 has a notch 19 in which the hook 1S seats when the rule is folded.

The end of the arm 11 carrying the pointer 10 seats slidably in a guide groove 20 at the l inner edge of the blade 5, thisV groove being formed by rabbeting the plate 9 ion top andhaving the blade 5 overhanging the rabbet.

This construction also spaces the blade 5 fronithe graduated face of the plate 9 a suficient distance to accommodate the pointer arms 11 and 13 when the rule is folded.l

When the device is used for measuring angles, the arm 13 is locked to the blade 6 and the rule is opened up until its blades 5 and 6 Iit in the angle to be measured as shown in Fig. 2. It will be noted that the outer edges of the blades are placed against the work. For laying off the angle to which the Work is to be sawed or cut, the inner edges of the blade 6 and' plate 9 are` used.` The blade 6 is first set to therequired angle, it bein swung outward from the blade 5 until tie pointer 10 indicates the corresponding angle on the scale 8. The arm 13' is novi7 disconnected from the blade 6 and Aplaced against one edge of the Worlgfleav2V 'ingthe'blade 6 projecting across the Work atthekangle the-latter isLtobe saWedor cnt'.- The edge of the plate 9 canbeplaced against the Work' vfor .the reasonthat it is oif'set yd oiivnwardllyiA from .theI plane. ofv the blade 6,

fand astheinneredge of the blade 6, adia- :centf'tolthe pivot`V 7', crosses the plateA 9,.the

' blade 5 ai'idthatthe.inner'edgeof the blade edges` ofthe blade 6f andthe yplate 9 a make. a f sharp c ornerf -Where theyV cross. -It` Will be understood, of course, that the onteredge ofiy the' lplate 9- is Y parallel tothe edge-*of the y 6,''ifaextended, Wonlfdi passthroiigli the censi. A mi@ tenof,thehinge connection TV The; device 'is qiiitefsiinplqit has a YWide connected foldablefblades, adegree-scale plate'enone ofthe'blades, said plate eX- tending. inthe direction ofthe length of andl being. parallel with? andprojecting frein that edge 1` efthe blade againstwhich the other bladefolds, and said llast mentioned blade beingfoldable` voir top of the proj ,ectingz per-V tion5-offvthe plate..and' an indicator for the V sca'le.-plate-"pivoted to theseeond inei'itionedy f blade. v

ofi the blade*againstl which the other blade l 47:0 folds-and said-last mentioned#blade.beingy 2.A nnlefcoinprisingafpair.'of pivotally connectedk foldable` blades,A ai. Vde igree-scale.

plate von'` one ofthe-blades, said plate' being fol dable on, topfJ of the; projecting lportion of the plate, and an indicatorforthe' scale platefpivotedto' the secon d mentionedblade,l andufitting .between said blade and 4the Vplate when the rule. is folded."-

- 3; A. rulecc niprisnig` a pair of pitotally connected foldable blades, a ldegreeseale comprising a pair of pivotallyf plate on one of theblades, said plate being parallel With and projecting frein that edge of. the-.blade againstawihich the other blade folds, the inner edge of the second inentioned-blade and the corresponding edge of `the-plate intersecting When the rule is iinfo'lded, andan indicator for the scale plate-y pivted tothe second mentioned blade, said indicator being foldable out of the space between the blade and the plate to leave said space unobstructed.l

4. Av rule comprising-a pair of pivotally connected vfoldable blades, a. degreescale plateV en one ofthe blades,.sai d. plate being,

parallel-With :and projecting. froin that edge of theblade 4against Vwhichx the other blade folds, the inner edge ofthe second inenf tioned blade and the correspondingedge of the plate intersecting.- WhenI lthe rule is nn- A folded, afpair ofpivotallyconnected arins range of usefulness,` and there is nothing `te.L interferewith its use asfanfordinar);7 rule'. f

oneofwhiclil is pivotedlto the second' inentioned blade and the other one of whichv has a pointer indicatingen the scale plate, and

connectpd`. 'foldable blades, a degree-scale .plate en one ofthe blades, said plate being parallel with. and projecting from that' edge ofthe blade againstV which the other blade folds, the inneredge ofthe second inen- Vtionedbladeand: the cerresp'onding kedge of;

the plate intersecting when the rule is unfolded, a pair of pivotally connected arms one. 0f which ispivoted to the second inentioned-blade andthe other one off which hasta pointer,indicatingon the scale plate,` and Vmeans for locking the first mentioned' 'arniin fixed relatioirwith respect toithe second inentioned'blade, said arinv heilig releasable from the blade for permitting bot-h arins to be folded out of the space between the blade and the plate to leave said space unobstructed.

Intestinionjy7 whereof afHiX my signature.

HOMER H. LAMBERT.

i copis ofth patentimay'hefebtiiiiiad friiie cents eaeh, byfaddressir'ng' the'cmmissinerofPatent.

' Washington, D. C?" 

